27805770684 has 18 divisors (see below), whose sum is σ = 70286809320. Its totient is φ = 9268590216.

The previous prime is 27805770653. The next prime is 27805770731. The reversal of 27805770684 is 48607750872.

It is a happy number.

27805770684 is a `hidden beast` number, since 2 + 7 + 8 + 0 + 577 + 0 + 68 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 27805770684.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 386191224 + ... + 386191295.

It is an arithmetic number, because the mean of its divisors is an integer number (3904822740).

Almost surely, 2^27805770684 is an apocalyptic number.

It is an amenable number.

27805770684 is an abundant number, since it is smaller than the sum of its proper divisors (42481038636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27805770684 is a wasteful number, since it uses less digits than its factorization.

27805770684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772382529 (or 772382524 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 54.

The spelling of 27805770684 in words is "twenty-seven billion, eight hundred five million, seven hundred seventy thousand, six hundred eighty-four".